Toothbrush head with stepped bristle array



FIG. 1 is a perspective view of my ornamental design for a toothbrush head with stepped bristle array;

FIG. 2 is a front view of the design thereof;

FIG. 3 is a rear view of the design thereof;

FIG. 4 is a plan, bottom view of the design thereof;

FIG. 5 is a plan, top view of the design thereof; and,

FIG. 6 is a side view the design thereof.

The broken line showing of environmental structure in FIGS. 1-3, 5 and 6 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a toothbrush head with stepped bristle array, as shown and described. 